import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import Params from '../components/goods/Params.vue'
import List from '../components/goods/List.vue'
import Add from '../components/goods/Add.vue'
import Order from '../components/order/Order.vue'
import Report from '../components/report/Report.vue'

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  { path: '/home',component:Home,redirect:'/welcome',
  children:[
    { path:'/welcome',component:Welcome},
    { path:'/users',component:Users},
    { path:'/rights',component:Rights},
    { path:'/roles',component:Roles},
    { path:'/categories',component:Cate},
    { path:'/params',component:Params},
    { path:'/goods',component:List},
    { path:'/goods/add',component:Add},
    { path:'/orders',component:Order},
    { path:'/reports',component:Report},
  ]}

]

const router = new VueRouter({
  routes
})

/* 
挂载路由导航守卫
to:将要访问的路径
from：从哪个路径跳转而来
next：函数，表示放行
      next()：放行
      next('/path')：强行跳转path页面
*/ 
router.beforeEach((to,from,next) => {
// 访问login，直接放行
if(to.path === '/login') return next()
//拿到token值
const token = window.sessionStorage.getItem('token')
// 如果没有token，代表没有登录，强行跳转到登录页
if(!token) return next('/login')
// 有token，放行
next()
})

export default router
